Lead telluride
Lead telluride
CAS: 1314-91-6;39280-96-1
Molecular Formula: PbTe
Lead telluride - Names and Identifiers
| Name | Lead telluride |
| Synonyms | PbTe LEAD TELLURIDE Lead telluride plumbous telluride LEAD(II) TELLURIDE Lead telluride (PbTe) telluroxo-lambda~2~-plumbane |
| CAS | 1314-91-6 39280-96-1 |
| EINECS | 215-247-1 |
| InChI | InChI=1/Pb.Te/rPbTe/c1-2 |
Lead telluride - Physico-chemical Properties
| Molecular Formula | PbTe |
| Molar Mass | 334.8 |
| Density | 8,164 g/cm3 |
| Melting Point | 905 °C |
| Water Solubility | Insoluble in water. |
| Appearance | Silver to dark gray crystalline or lumpy |
| Specific Gravity | 8.164 |
| Color | Gray |
| Exposure Limit | ACGIH: TWA 0.05 mg/m3; TWA 0.1 mg/m3NIOSH: IDLH 25 mg/m3; IDLH 100 mg/m3; TWA 0.1 mg/m3; TWA 0.050 mg/m3 |
| Merck | 14,5422 |
| Storage Condition | Room Temprature |
| MDL | MFCD00016274 |
| Use | It has semiconductor properties. Used as a material for infrared exploration devices and thermoelectric refrigeration. |
Lead telluride - Risk and Safety
| Hazard Symbols | N - Dangerous for the environment T,N,T - |
| Risk Codes | R62 - Possible risk of impaired fertility R61 - May cause harm to the unborn child R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R33 - Danger of cumulative effects R20/22 - Harmful by inhalation and if swallowed. |
| Safety Description | S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S60 - This material and its container must be disposed of as hazardous waste. S53 - Avoid exposure - obtain special instructions before use. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | 3284 |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 28429010 |
| Hazard Class | 6.1 |
| Packing Group | III |
Lead telluride - Introduction
Compounds of tellurium and lead. Insoluble in water, insoluble in acid.
Last Update：2022-10-16 17:13:19
Lead telluride - Reference Information
| crystal structure | Cubic, Halite Structure - Space Group Fm3m |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | PbTe is a good thermoelectric material. Different preparation methods have great influence on its thermoelectric performance. In many methods of preparing thermoelectric materials, the thermoelectric properties of the material are mainly improved by improving the electrical conductivity of the material while reducing the thermal conductivity of the material (mainly reducing the lattice thermal conductivity of the material). |
| preparation | high purity Pb powder and Te powder are mixed according to the chemical dose ratio (1: 1), after powder compression molding, the sample is loaded into a high-pressure cavity. Graphite is used as heating tube in the assembly cavity, pyrophyllite is used as insulating tube, the synthesis pressure is 4.0GPa, the temperature is 1200K, the cooling rate of the sample after heating is stopped is 60 K/s, and the average grain size of PbTe is 1000nm. The conductivity of the sample is 6 × 10-5Ω · m, and the thermal conductivity value is 1.4w/m.k. |
| usage | has semiconductor properties. Used as a material for infrared exploration devices and thermoelectric refrigeration. |
Last Update：2024-04-09 21:04:16
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